Category Archives: math


My five-year-old has been able to rattle off the numbers in order into the teens for a while, but when you ask her to count a set of objects, she can only get up to three consistently. “One, two, three–um–five?” … Continue reading

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Latin Squares, Squared Squares, and Legoed Squares

I introduced my kids to Latin Squares the other day. If you know Sudoku then you have seen examples of Latin squares. The idea is to fill in a grid of squares with colors or numbers or some other symbols, … Continue reading

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An Evening of Math I

My wife has taken on the challenge of homeschooling our children this year. My main participation in this is a weekly math session with the kids in the evening on any subject of my choosing! Tonight was our first session. … Continue reading

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How to Eat an Equilateral Cheeseburger

My friend Sean worked out an elegant and practical solution to the Cheeseburger problem of my previous post.  I will try to summarize it here. There are fifteen toppings.  To make things simpler we’ll represent them with the numbers one … Continue reading

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Two Problems in Elementary Cheeseburger Theory

A favorite hamburger joint of mine has the following 15 choices for toppings: Mayo Relish Onions Lettuce Pickles Tomatoes Grilled Onions Grilled Mushrooms Ketchup Mustard Jalapeno Peppers Green Peppers A-1 Sauce Bar-B-Q Sauce Hot Sauce After much experimentation, I’ve decided … Continue reading

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Latest picks from the library

Here are the two books that I grabbed recently from the library: How Math Works: 100 Ways Parents and Kids Can Share the Wonders of Mathematics, by Carol Vorderman.  Lots of activities here, but not all of them are all that … Continue reading

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Go Figure

I’ve only looked through this book a little so far, but it looks awesome.  My 7 and 5 year old have looked at it and had fun and I learned several math facts I didn’t know from it today.  I … Continue reading

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